<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
        var score = parseInt(prompt("请输入您的成绩："))
        if(score>=90){
            console.log('优秀')
        }else if(score>=70){
            console.log('良好')
        }else if(score>=60){
            console.log('及格')
        }else{
            console.log('不及格')
        }

        var day = '星期二'
        switch(day){
            case '星期一':
                console.log(111)
                break;
            case '星期二':
            case '星期三':
            case '星期四':
            case '星期五':
                console.log(222)
                break;
            default:
                console.log(333)
                break;
        }
    </script>
</head>
<body>

</body>
</html>